图形处理单元加速密度合适合集群和运动方程合集群方法与旋转轨道合.
Zhifan Wang1, Bo Liu2, Jian Xu3
1College of Chemistry and Life Science/Sichuan Provincial Key Laboratory for Structural Optimization and Application of Functional Molecules, Chengdu Normal University, Chengdu 611130, P. R. China.
新的合集群 (CC) 程序使用密度合适 (DF) 近似方法在重元素中有效计算旋转轨道合 (SOC). 这些DF-SOC-CC方法提供了精确的结果,降低了计算成本和GPU加速.
科学领域:
- 计算化学的计算化学
- 量子化学 是一个量子化学.
- 理论化学 理论化学
背景情况:
- 准确的电子结构计算对于理解重元素系统至关重要.
- 旋转轨道合 (SOC) 显著影响重元素的性质.
- 现有的SOC计算方法可能是资源密集的.
研究的目的:
- 开发高效的合集群 (CC) 程序,将旋转轨道合 (SOC) 纳入密度合适 (DF) 方程中.
- 为了实现重元素系统的准确和计算可行的电子结构计算.
主要方法:
- 密度合适旋转轨道合 (DF-SOC) 在合集群 (CC) 方法中的实施:DF-SOC-CCSD,DF-SOC-CCSD,以及DF-SOC-EOM-EE-CCSD.
- 使用自旋独立的公式来简化代码和图形处理器 (GPU) 的加速.
- 整合空间对称性和单/双精度,以提高计算效率.
主要成果:
- 在涉及SOC的计算中,DF近似引入了可以忽略不计的错误.
- 即使使用单精度算法,也可以保持精确的SOC分割.
- GPU 加速表现出良好的可扩展性,在较大的系统中实现了超过5倍的加速度.
结论:
- 开发的DF-SOC-CC程序套件为重元素系统的电子结构计算提供了准确和高效的方法.
- 这些方法有效地处理重元素中SOC的复杂性.
- 通过DF近似和GPU加速,计算效率得到了显著的提高.
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